fix: allow reading pyarrow timestamptz as iceberg timestamp #7584

Job	Run time
integration-test-s3	1m 19s
lint-and-unit-test (3.12)	3m 7s
integration-test	8m 52s
integration-test-gcs	1m 14s
integration-test-adls	1m 25s
lint-and-unit-test (3.10)	2m 52s
lint-and-unit-test (3.13)	3m 2s
lint-and-unit-test (3.11)	2m 41s
integration-coverage-report	1s
	24m 33s

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